JP7094662B2 - Manufacturing method of fiber reinforced resin parts for automobile body or aircraft body - Google Patents

Manufacturing method of fiber reinforced resin parts for automobile body or aircraft body Download PDF

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JP7094662B2
JP7094662B2 JP2017091289A JP2017091289A JP7094662B2 JP 7094662 B2 JP7094662 B2 JP 7094662B2 JP 2017091289 A JP2017091289 A JP 2017091289A JP 2017091289 A JP2017091289 A JP 2017091289A JP 7094662 B2 JP7094662 B2 JP 7094662B2
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昌之 久保脇
洋介 山崎
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株式会社チャレンヂ
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本発明は、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法に関する。 The present invention relates to a method for manufacturing a fiber reinforced resin component for an automobile body or an aircraft body .

強化繊維とマトリックス樹脂組成物を含有する繊維強化樹脂、例えば、炭素繊維複合材料(Carbon Fiber Reinforced Plastics:以下、CFRPと略称することがある)等からなる成形体は、軽量で優れた機械特性を有するため、航空機や車両等の様々な用途で広く用いられている。このような繊維強化樹脂からなる成形体の製造には、強化繊維基材にマトリックス樹脂組成物を含浸した、中間基材、即ち成形品前駆体であるシート状のプリプレグが広く用いられている。 A molded product made of a fiber-reinforced resin containing a reinforcing fiber and a matrix resin composition, for example, a carbon fiber composite material (hereinafter, abbreviated as CFRP), is lightweight and has excellent mechanical properties. Because it has, it is widely used in various applications such as aircraft and vehicles. In the production of a molded product made of such a fiber-reinforced resin, an intermediate base material, that is, a sheet-shaped prepreg which is a precursor of a molded product, in which a reinforcing fiber base material is impregnated with a matrix resin composition, is widely used.

従来から、繊維強化樹脂のプリプレグから製造された成形体を、自動車の車体や航空機の機体等に取り付ける場合には、例えば、ボルト等の締結具を成形体に形成された貫通孔に挿通し、ねじ留めによって成形体と車体等との間を締結する方法が採用されている。しかしながら、このような方法では、樹脂からなる成形体に、経時的にクリープ現象による肉痩せが生じるため、ボルトによる軸方向での締結力が低下し、ボルトに緩みが生じるおそれがあった。 Conventionally, when a molded body manufactured from a fiber reinforced resin prepreg is attached to an automobile body, an aircraft body, or the like, for example, a fastener such as a bolt is inserted into a through hole formed in the molded body. A method of fastening between the molded body and the vehicle body or the like by screwing is adopted. However, in such a method, since the molded body made of resin becomes thin due to the creep phenomenon over time, the fastening force of the bolt in the axial direction is reduced, and the bolt may be loosened.

上記のような、ボルト等の締結具によって樹脂成形体にクリープ現象が生じるのを抑制するためには、例えば、金属製のカラーを成形体の貫通孔装着し、ボルトとの接触箇所を金属部品から構成することが有効であることが知られている(例えば、特許文献1を参照)。特許文献1に記載の締結構造によれば、成形体に形成された貫通孔に、接着剤を用いてカラーが接着されており、ボルトとカラーがメタルタッチするように構成されている。特許文献1では、ボルト締結に伴う軸方向の力を金属製のカラーで受ける構成とすることで、クリープ現象の影響を受けず、ボルトの緩みが生じるのを抑制することが可能とされている。 In order to prevent the creep phenomenon from occurring in the resin molded body due to fasteners such as bolts as described above, for example, a metal collar is attached to the through hole of the molded body, and the contact point with the bolt is a metal part. It is known that it is effective to construct from (see, for example, Patent Document 1). According to the fastening structure described in Patent Document 1, the collar is adhered to the through hole formed in the molded body by using an adhesive, and the bolt and the collar are configured to make a metal touch. In Patent Document 1, it is possible to suppress the loosening of bolts without being affected by the creep phenomenon by adopting a structure in which the axial force associated with bolt fastening is received by a metal collar. ..

特開2016-114139号公報Japanese Unexamined Patent Publication No. 2016-114139

しかしながら、特許文献1に記載の締結構造では、プリプレグを加圧成形する工程、孔開け(切削)を行う工程、及びカラーを接着する工程が必要となり、成形後の加工工程が煩雑になる。また、プリプレグを加圧成形して硬化させた後に孔開けを行うことから、切削等による孔開け加工がし難くなり、加工性が低くなる。このため、特許文献1に記載の技術を採用した場合には、加工精度の低下や製造コストの増大、及び生産性の低下を招くおそれがあった。 However, the fastening structure described in Patent Document 1 requires a step of pressure molding the prepreg, a step of drilling (cutting), and a step of adhering the collar, which complicates the processing step after molding. Further, since the prepreg is pressure-molded and hardened before drilling, it becomes difficult to drill holes by cutting or the like, and the workability is lowered. Therefore, when the technique described in Patent Document 1 is adopted, there is a possibility that the processing accuracy is lowered, the manufacturing cost is increased, and the productivity is lowered.

本発明は上記問題に鑑みてなされたものであり、樹脂のクリープ現象が生じることなく、経時的に締結力の緩みが生じるのを抑制できる、自動車の車体又は航空機の機体に用いられる繊維強化樹脂部品を、優れた加工精度で、生産性よく低コストで製造することが可能な自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法を提供することを目的とする。 The present invention has been made in view of the above problems, and is a fiber-reinforced resin used for an automobile body or an aircraft body, which can suppress the loosening of the fastening force over time without causing the resin creep phenomenon. It is an object of the present invention to provide a method for manufacturing a fiber-reinforced resin part for an automobile body or an aircraft body, which can manufacture a part with excellent processing accuracy, high productivity and low cost.

本発明者らが、上記目的を達成するために鋭意検討を重ねた結果、加熱加圧成型を行う前にプリプレグに貫通孔を形成する工程と、その後、プリプレグを加熱加圧成形するのと同時にカラーを一体成形する工程とを設け、前記貫通孔を形成する工程において、硬化前の比較的軟らかなプリプレグに対して孔開け加工を行うことで、従来のような、成形後の非常に硬い状態となった成形品前駆体を加工する場合に比べて加工精度や加工性が向上することを見出した。さらに、カラーを接着する工程が不要となり、成形後に行っていた加工工程を省略できることを見出し、本発明を完成させた。
即ち、本発明は、以下の態様を包含する。
As a result of diligent studies to achieve the above object, the present inventors have formed a through hole in the prepreg before the heat-pressurization molding, and thereafter, at the same time as the heat-pressurization molding of the prepreg. By providing a step of integrally molding the collar and performing a hole drilling process on the relatively soft prepreg before curing in the step of forming the through hole, it is in a very hard state after molding as in the conventional case. It has been found that the processing accuracy and workability are improved as compared with the case of processing the molded product precursor. Further, they have found that the step of adhering the collar becomes unnecessary and the processing step performed after molding can be omitted, and the present invention has been completed.
That is, the present invention includes the following aspects.

[1] 強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、内部に空洞部が設けられた円筒状の筒部を有するカラーを前記貫通孔に挿通させる挿通工程と、前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、を備える、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[2] 強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、位置決めピンに、内部に空洞部が設けられた円筒状の筒部を有するカラー、及び、前記成形品前駆体に形成された前記貫通孔を挿通させ、前記カラーと前記成形品前駆体との位置を調整しながら前記カラーを前記貫通孔に挿通させる挿通工程と、前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、を備える、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[3] 強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、内部に空洞部が設けられた円筒状の筒部を有するカラーを前記貫通孔に挿通させる挿通工程と、前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、を備え、前記カラーは、前記筒部及びハット部を有するハット型に形成されており、前記貫通孔形成工程は、前記貫通孔とともに、前記成形品前駆体の一面に、前記カラーの前記ハット部が収容される凹部を形成し、前記挿通工程は、前記ハット部を前記凹部に収容しながら、前記筒部を前記貫通孔に挿通させる、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[4] 前記複数枚のプリプレグのうち、前記一体成形工程において成形型と接する側に配置された前記プリプレグの前記貫通孔が、他の前記貫通孔よりも大きく、前記挿通工程は、前記カラーの前記ハット部を、前記複数枚のプリプレグのうち、前記成形型と接する側の前記プリプレグの前記貫通孔と接する状態とする工程を含む、上記[3]に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[5] 前記一体成形工程は、前記成形品前駆体を、一対の金型からなる成形型で加熱加圧して硬化する、上記[1]~[4]の何れかに記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[6] 前記一体成形工程は、前記成形品前駆体を、減圧雰囲気中において加熱して硬化する、上記[1]~[4]の何れかに記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[7] 前記一体成形工程は、前記成形品前駆体を、減圧雰囲気中において加熱加圧して硬化する、上記[1]~[4]の何れかに記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[8] 前記一体成形工程は、前記カラーの筒部の先端が前記成形品前駆体の他面側よりも突出するように、前記成形品前駆体と前記カラーとを一体成形する、上記[1]~[7]の何れかに記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[9] 前記プリプレグに含有される熱硬化性のマトリックス樹脂組成物が、エポキシ系樹脂又はウレタン系樹脂である、上記[1]~[8]の何れかに記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
[1] A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing a reinforcing fiber and a thermosetting matrix resin composition are sequentially laminated. It includes an insertion step of inserting a collar having a cylindrical tubular portion provided with a hollow portion into the through hole, and an integral molding step of molding while integrating the molded product precursor and the collar. , A method for manufacturing fiber reinforced resin parts for the body of an automobile or the body of an aircraft.
[2] A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing reinforcing fibers and a thermosetting matrix resin composition are sequentially laminated. A collar having a cylindrical tubular portion having a hollow portion inside and the through hole formed in the molded product precursor are inserted into the positioning pin, and the positions of the collar and the molded product precursor are formed. A fiber for an automobile body or an aircraft body, comprising an insertion step of inserting the collar into the through hole while adjusting the above, and an integral molding step of molding while integrating the molded product precursor and the collar. Manufacturing method of reinforced resin parts.
[3] A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing a reinforcing fiber and a thermosetting matrix resin composition are sequentially laminated. It is provided with an insertion step of inserting a collar having a cylindrical tubular portion provided with a hollow portion into the through hole, and an integral molding step of molding while integrating the molded product precursor and the collar. The collar is formed in a hat shape having the cylinder portion and the hat portion, and in the through hole forming step, the hat portion of the collar is housed on one surface of the molded product precursor together with the through hole. A method for manufacturing a fiber-reinforced resin component for an automobile body or an aircraft body, wherein the recess is formed, and the insertion step is to insert the cylinder portion into the through hole while accommodating the hat portion in the recess.
[4] Of the plurality of prepregs, the through hole of the prepreg arranged on the side in contact with the molding die in the integral molding step is larger than the other through holes, and the insertion step is performed in the collar. The vehicle body or aircraft body of the vehicle according to the above [3], which comprises a step of bringing the hat portion into contact with the through hole of the prepreg on the side of the plurality of prepregs in contact with the molding die. Manufacturing method of fiber reinforced resin parts.
[5] The vehicle body or the vehicle body of the automobile according to any one of [1] to [4] above, wherein in the integral molding step, the molded product precursor is heated and pressed by a molding die consisting of a pair of molds to be cured. Manufacturing method of fiber reinforced resin parts for aircraft fuselage.
[6] The fiber reinforced plastic for an automobile body or an aircraft according to any one of [1] to [4] above, wherein in the integral molding step, the molded product precursor is heated and cured in a reduced pressure atmosphere. Manufacturing method of resin parts.
[7] The fiber for an automobile body or an aircraft body according to any one of [1] to [4] above, wherein in the integral molding step, the molded product precursor is heated and pressurized in a reduced pressure atmosphere to be cured. Manufacturing method of reinforced resin parts.
[8] In the integrally molding step, the molded product precursor and the collar are integrally molded so that the tip of the tubular portion of the collar protrudes from the other surface side of the molded product precursor. ] To [7], the method for manufacturing a fiber reinforced resin component for an automobile body or an aircraft body.
[9] The body of an automobile or the airframe of an aircraft according to any one of the above [1] to [8], wherein the thermosetting matrix resin composition contained in the prepreg is an epoxy resin or a urethane resin. Manufacturing method of fiber reinforced resin parts for aircraft.

本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法によれば、上記のように、プリプレグからなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、その後、成形品前駆体とカラーとを一体化させながら成形する一体成形工程とを備えた方法なので、硬化前の比較的軟らかなプリプレグに対して孔開け加工を行うことで、優れた加工精度及び加工性が得られる。また、カラーを接着する工程が不要となるので、成形後に行っていた加工工程を省略できる。さらに、樹脂のクリープ現象が生じることなく、経時的に締結力の緩みが生じるのを抑制できる、自動車の車体又は航空機の機体に用られる繊維強化樹脂部品を、優れた加工精度で、生産性よく低コストで製造することが可能になる。 According to the method for manufacturing a fiber-reinforced resin component for an automobile body or an aircraft body according to the present invention, as described above, a through hole forming step of forming a molded product precursor having a through hole formed of a prepreg is formed. After that, since it is a method equipped with an integral molding process in which the precursor of the molded product and the collar are integrally molded, excellent processing accuracy is achieved by drilling holes in the relatively soft prepreg before curing. And workability can be obtained. Further, since the step of adhering the collar is not required, the processing step performed after molding can be omitted. Furthermore, fiber reinforced resin parts used for automobile bodies or aircraft bodies , which can suppress loosening of fastening force over time without causing resin creep phenomenon, can be produced with excellent processing accuracy and high productivity. It will be possible to manufacture at low cost.

本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法によって得られる繊維強化樹脂部品の一例を模式的に説明する断面図である。It is sectional drawing schematically explaining an example of the fiber reinforced resin component obtained by the manufacturing method of the fiber reinforced resin component for the body of an automobile or the airframe of an aircraft which concerns on this invention. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法に用いる部品の一例を模式的に説明する図であり、図1に示す繊維強化樹脂部品に備えられるカラーを単体で示す平面図である。It is a figure schematically explaining an example of the part used in the manufacturing method of the fiber reinforced resin part for the body of an automobile or the body of an aircraft which concerns on this invention, and the color provided for the fiber reinforced resin part shown in FIG. 1 is a single body. It is a plan view shown by. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法によって得られる繊維強化樹脂部品の一例を模式的に説明する図であり、繊維強化樹脂部品を金属製の被接続部材にボルトで締結した状態を示す断面図である。It is a figure schematically explaining an example of the fiber reinforced resin component obtained by the manufacturing method of the fiber reinforced resin component for the body of an automobile or the fuselage of an aircraft which concerns on this invention, and the fiber reinforced resin component is used as a metal connected member. It is sectional drawing which shows the state which fastened with a bolt. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の一例を模式的に説明する図であり、成形品前駆体を構成する複数のプリプレグに貫通孔を形成する貫通孔形成工程を示す概略図である。It is a figure schematically explaining an example of the manufacturing method of the fiber reinforced resin component for the body of an automobile or the body of an aircraft which concerns on this invention, and is the figure which forms the through hole forming a through hole in a plurality of prepregs constituting a molded article precursor. It is a schematic diagram which shows the process. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の一例を模式的に説明する図であり、貫通孔形成工程において、複数のプリプレグに貫通孔を形成した後、これらプリプレグを積層して成形品前駆体とした状態を示す断面図である。It is a figure schematically explaining an example of the manufacturing method of the fiber reinforced resin component for the body of an automobile or the body of an aircraft which concerns on this invention, and these prepregs are made after forming through holes in a plurality of prepregs in the through hole forming process. It is a cross-sectional view which shows the state which made the molded article precursor by laminating. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の一例を模式的に説明する図であり、挿通工程において、カラーを位置決めピンにセットした状態を示す概略図である。It is a figure which schematically explains an example of the manufacturing method of the fiber reinforced resin component for the body of an automobile or the body of an aircraft which concerns on this invention, and is the schematic diagram which shows the state which the collar was set to the positioning pin in the insertion process. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の一例を模式的に説明する図であり、挿通工程において、成形品前駆体の貫通孔にカラーを挿通させた状態を示す概略図である。It is a figure schematically explaining an example of the manufacturing method of the fiber reinforced resin part for the body of an automobile or the body of an aircraft which concerns on this invention, and shows the state which the collar is inserted into the through hole of the article precursor in the insertion process. It is a schematic diagram which shows. 本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の一例を模式的に説明する図であり、カラーを一体化させながら成形品前駆体を加熱加圧成形する一体成形工程を示す概略図である。It is a figure schematically explaining an example of the manufacturing method of the fiber reinforced resin part for the body of an automobile or the body of an aircraft which concerns on this invention, and is the integral molding process which heat-press molding the molded article precursor while integrating the color. It is a schematic diagram which shows.

以下、本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法の実施の形態を挙げ、図1~図8を適宜参照しながら説明する。なお、以下の説明で用いる各図面は、その特徴をわかりやすくするために、便宜上、特徴となる部分を拡大して示している場合があり、各構成要素の寸法比率等は実際とは異なる場合がある。また、以下の説明において例示される材料等は一例であって、本発明はそれらに限定されるものではなく、その要旨を変更しない範囲で適宜変更して実施することが可能である。 Hereinafter, embodiments of a method for manufacturing a fiber-reinforced resin component for an automobile body or an aircraft body according to the present invention will be described, and will be described with reference to FIGS. 1 to 8 as appropriate. In addition, in each drawing used in the following description, in order to make the feature easy to understand, the feature part may be enlarged and shown, and the dimensional ratio of each component may be different from the actual one. There is. Further, the materials and the like exemplified in the following description are examples, and the present invention is not limited to them, and the present invention can be appropriately modified without changing the gist thereof.

本発明に係る自動車の車体又は航空機の機体用繊維強化樹脂部品(以下、樹脂部品と略称することがある)の製造方法は、詳細を後述するように、シート状のプリプレグからなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程、カラーを貫通孔に挿通させる挿通工程、及び、成形品前駆体とカラーとを一体化させながら成形する一体成形工程を備える方法である。 The method for manufacturing a fiber-reinforced resin component for an automobile body or an aircraft body (hereinafter, may be abbreviated as a resin component) according to the present invention has a through hole made of a sheet-shaped prepreg, as described in detail later. It is a method including a through hole forming step of forming a formed molded article precursor, an insertion step of inserting a collar through the through hole, and an integral molding step of forming while integrating the molded article precursor and the collar.

<繊維強化樹脂部品>
以下、本実施形態の製造方法によって得られる樹脂部品1の構成について説明する。図1は樹脂部品1を示す断面図であり、図2は樹脂部品1に備えられるカラー3を示す平面図、図3は樹脂部品1を、ボルト6を用いて金属製の被締結物5に締結した状態を示す断面図である。
<Fiber reinforced plastic parts>
Hereinafter, the configuration of the resin component 1 obtained by the manufacturing method of the present embodiment will be described. 1 is a cross-sectional view showing a resin part 1, FIG. 2 is a plan view showing a collar 3 provided in the resin part 1, and FIG. 3 shows the resin part 1 attached to a metal object to be fastened 5 by using a bolt 6. It is sectional drawing which shows the fastened state.

図1に示すように、本実施形態の製造方法で得られる樹脂部品1は、成形体2に形成された貫通孔21にカラー3(図2も参照)が挿通され、成形体2とカラー3とが一体化された構成とされている。また、図示例の樹脂部品1は、全体的な図示を省略しているが、例えば、概略平板状に形成されたものである。また、樹脂部品1は、例えば、自動車のフェンダー等の外装部材として用いられる場合には、加圧成形によって所定の形状を適宜付与したうえで、車体側への締結箇所及びその近傍のみが略平板状に形成された構成とすることができる。 As shown in FIG. 1, in the resin component 1 obtained by the manufacturing method of the present embodiment, the collar 3 (see also FIG. 2) is inserted through the through hole 21 formed in the molded body 2, and the molded body 2 and the collar 3 are inserted. And are integrated. Further, although the overall illustration of the resin component 1 in the illustrated example is omitted, for example, the resin component 1 is formed in a substantially flat plate shape. Further, when the resin component 1 is used as an exterior member such as a fender of an automobile, for example, after appropriately imparting a predetermined shape by pressure molding, only a fastening portion to the vehicle body side and its vicinity are substantially flat plates. It can be formed in a shape.

成形体2は、強化繊維と熱硬化性のマトリックス樹脂組成物を含有する繊維強化樹脂、即ち、強化繊維基材にマトリックス樹脂組成物が含浸された繊維強化樹脂からなり、例えば、炭素繊維複合材料(CFRP)等が用いられる。本実施形態で説明する成形体2には、詳細な図示を省略するが、平面視円形状の貫通孔21、及び、貫通孔21の開口部を取り囲むように設けられる平面視円形状の凹部22が、それぞれ、所定の位置、大きさ、及び所定の数量で設けられている。また、本実施形態で説明する成形体2は、上記の繊維強化樹脂からなるシート状のプリプレグ(図3中の符号20A,20B,20Cを参照)が1枚もしくは2枚以上で積層されてなる成形品前駆体(図3中の符号20を参照)が硬化・成形されたものである。 The molded body 2 is made of a fiber-reinforced resin containing reinforcing fibers and a thermosetting matrix resin composition, that is, a fiber-reinforced resin in which a reinforcing fiber base material is impregnated with the matrix resin composition. For example, a carbon fiber composite material. (CFRP) or the like is used. Although detailed illustration is omitted, the molded body 2 described in the present embodiment has a plan-viewing circular through hole 21 and a plan-viewing circular recess 22 provided so as to surround the opening of the through-hole 21. Are provided at predetermined positions, sizes, and predetermined quantities, respectively. Further, the molded body 2 described in the present embodiment is formed by laminating one or more sheet-shaped prepregs (see reference numerals 20A, 20B, 20C in FIG. 3) made of the above fiber-reinforced resin. A molded product precursor (see reference numeral 20 in FIG. 3) is cured and molded.

マトリックス樹脂組成物を含浸させる繊維強化基材の形態としては、例えば、多数の長尺の強化繊維を一方向に引き揃えたUDシート(一方向シート)、強化繊維を製織して織物としたクロス材、強化繊維からなる不織布等が挙げられる。これらの中でも、成形体2の意匠性の観点からは、クロス材を用いることが好ましい。このクロス材としては、必要な方向に強化繊維を配置した一方向性織物、平織、朱子織、綾織等の二方向性織物、三軸織、ノンクリンプ織物等の何れの織組織のクロス材であってもよく、意匠性に優れた平織や、意匠性及び加工性に優れた綾織を用いることが好ましい。また、上記の各形態からなるプリプレグとしても、1種のみを使用してもよく、2種以上を併用してもよい。 The form of the fiber-reinforced base material impregnated with the matrix resin composition is, for example, a UD sheet (one-way sheet) in which a large number of long reinforcing fibers are arranged in one direction, or a cloth in which the reinforcing fibers are woven into a woven fabric. Examples thereof include non-woven fabrics made of materials and reinforcing fibers. Among these, from the viewpoint of the design of the molded body 2, it is preferable to use a cloth material. The cloth material may be a unidirectional woven fabric in which reinforcing fibers are arranged in a required direction, a bidirectional woven fabric such as plain weave, satin weave, or twill weave, or a cloth material having a woven structure such as a triaxial woven fabric or a non-crimp woven fabric. It may be preferable to use a plain weave having excellent designability or a twill weave having excellent designability and processability. Further, as the prepreg consisting of each of the above forms, only one type may be used, or two or more types may be used in combination.

繊維強化基材に用いられる強化繊維としては、特に限定されないが、例えば、炭素繊維、アラミド繊維、炭化ケイ素繊維、アルミナ繊維、ボロン繊維、タングステンカーバイド繊維、及びガラス繊維等が挙げられる。これらの中でも、強化繊維として、比強度、比弾性率に優れる点から、炭素繊維を用いることが好ましい。また、繊維強化樹脂中に含まれる強化繊維は、1種を単独で使用してもよく、2種以上を併用してもよい。 The reinforcing fiber used for the fiber-reinforced base material is not particularly limited, and examples thereof include carbon fiber, aramid fiber, silicon carbide fiber, alumina fiber, boron fiber, tungsten carbide fiber, and glass fiber. Among these, carbon fiber is preferably used as the reinforcing fiber because of its excellent specific strength and specific elastic modulus. In addition, one type of reinforcing fiber contained in the fiber reinforced resin may be used alone, or two or more types may be used in combination.

また、強化繊維基材の目付としては、特に限定されないが、70~800g/mが好ましく、150~250g/mがより好ましい。強化繊維基材の目付が上記の範囲内であれば、マトリックス樹脂組成物の含浸性が良好となる。また、強化繊維基材の目付が70g/m以上であれば、より外観良好な成形品が得られる。さらに、強化繊維基材の目付が150g/m以上であれば、安価に表面平滑な複合材料成形体を得ることができる。またさらに、強化繊維基材の目付が800g/m以下であれば、強化繊維基材の加工が容易になる。 The basis weight of the reinforcing fiber base material is not particularly limited, but is preferably 70 to 800 g / m 2 , and more preferably 150 to 250 g / m 2 . When the basis weight of the reinforcing fiber base material is within the above range, the impregnation property of the matrix resin composition is good. Further, when the basis weight of the reinforcing fiber base material is 70 g / m 2 or more, a molded product having a better appearance can be obtained. Further, when the basis weight of the reinforcing fiber base material is 150 g / m 2 or more, a composite material molded product having a smooth surface can be obtained at low cost. Further, when the basis weight of the reinforcing fiber base material is 800 g / m 2 or less, the processing of the reinforcing fiber base material becomes easy.

本実施形態で説明する樹脂部品1は、成形体2をなす繊維強化樹脂に含まれるマトリックス樹脂組成物として熱硬化性の樹脂を採用する。このように、マトリックス樹脂組成物に熱硬化性樹脂を採用することで、強化繊維基材へのマトリックス樹脂組成物の含浸性が高められるとともに、成形品2の機械的特性を高めることが可能になる。さらに、マトリックス樹脂組成物に熱硬化性樹脂を採用することで、詳細を後述する工程によって成形品前駆体(成形体2)とカラー3とを一体成形した際に、成形体2とカラー3との固定強度が高められるという効果が得られる。 The resin component 1 described in the present embodiment employs a thermosetting resin as the matrix resin composition contained in the fiber-reinforced resin forming the molded body 2. As described above, by adopting the thermosetting resin for the matrix resin composition, it is possible to enhance the impregnation property of the matrix resin composition into the reinforcing fiber base material and to enhance the mechanical properties of the molded product 2. Become. Further, by adopting a thermosetting resin for the matrix resin composition, when the molded product precursor (molded body 2) and the collar 3 are integrally molded by the step described in detail later, the molded product 2 and the collar 3 are formed. The effect of increasing the fixing strength of the is obtained.

マトリックス樹脂組成物に用いる熱硬化性の樹脂としては、特に限定されず、プリプレグに用いられる公知の熱硬化性樹脂を使用することができ、例えば、エポキシ系樹脂、フェノール樹脂、不飽和ポリエステル樹脂、ウレタン系樹脂、尿素性樹脂等が挙げられる。なかでも、熱硬化性樹脂としては、樹脂部品1の機械的特性を高められる観点から、エポキシ系樹脂又はウレタン系樹脂を用いることが好ましい。また、マトリックス樹脂組成物に用いる熱硬化性樹脂としては、1種を単独で使用してもよく、2種以上を併用してもよい。 The thermosetting resin used in the matrix resin composition is not particularly limited, and a known thermosetting resin used for prepreg can be used, for example, an epoxy resin, a phenol resin, an unsaturated polyester resin, and the like. Examples thereof include urethane-based resins and urea-based resins. Among them, as the thermosetting resin, it is preferable to use an epoxy resin or a urethane resin from the viewpoint of enhancing the mechanical properties of the resin component 1. Further, as the thermosetting resin used in the matrix resin composition, one type may be used alone, or two or more types may be used in combination.

また、マトリックス樹脂組成物には、必要に応じて、難燃剤、耐候性改良剤、酸化防止剤、熱安定剤、紫外線吸収剤、可塑剤、滑剤、着色剤、相溶化剤、非繊維状フィラー、導電性フィラー、離型剤、又は界面活性剤等の添加剤を配合してもよい。また、上記の添加剤としては、1種を単独で使用してもよく、2種以上を併用してもよい。 Further, the matrix resin composition may contain, if necessary, a flame retardant, a weather resistance improver, an antioxidant, a heat stabilizer, an ultraviolet absorber, a plasticizer, a lubricant, a colorant, a companion agent, and a non-fibrous filler. , Conductive fillers, mold release agents, or additives such as surfactants may be blended. Further, as the above-mentioned additive, one kind may be used alone, or two or more kinds may be used in combination.

カラー3は、成形体2に形成された貫通孔21に挿通され、成形体2と一体化されたものであり、図1及び図2に示す例においては、円筒状の筒部31と、平面視円形状のハット部32とを備えた、平面視で環状のハット型に構成されている。また、カラー3の内部には、該カラー3の長軸方向で貫くように空洞部33が設けられている。 The collar 3 is inserted through a through hole 21 formed in the molded body 2 and integrated with the molded body 2. In the examples shown in FIGS. 1 and 2, the collar 3 has a cylindrical tubular portion 31 and a flat surface. It is configured in a circular hat shape in a plan view with a circular hat portion 32. Further, inside the collar 3, a cavity 33 is provided so as to penetrate the collar 3 in the long axis direction.

そして、図1等に示すように、カラー3は、筒部31が成形体2の貫通孔21に挿通されるとともに、ハット部32が、成形体2の一面2a側に形成された凹部22の内部に収容され、成形体2と一体化されている。より具体的には、後述するような本発明に係る製造方法で備えられる一体成形工程において、成形品前駆体20とカラー3とがともに加熱される一体成形(インサート成形)により、成形体2の貫通孔21とカラー3とが強固に固定して一体化される。 Then, as shown in FIG. 1 and the like, in the collar 3, the tubular portion 31 is inserted into the through hole 21 of the molded body 2, and the hat portion 32 is formed in the recess 22 formed on the one side 2a side of the molded body 2. It is housed inside and integrated with the molded body 2. More specifically, in the integral molding step provided by the manufacturing method according to the present invention as described later, the molded product 2 is subjected to integral molding (insert molding) in which both the molded product precursor 20 and the collar 3 are heated. The through hole 21 and the collar 3 are firmly fixed and integrated.

樹脂部品1は、上記のようなカラー3が設けられることにより、図3に例示するように、ボルト6及びナット7を用いて、例えば、自動車の車体等の、金属からなる被締結物5に対して樹脂部品1を締結した場合に、樹脂製の成形体2とボルト6とが直に当接しないので、成形体2にクリープ現象が生じるのを抑制できる。これにより、締結から時間が経過した場合であっても、ボルト6に緩みが生じるのを抑制し、長期に渡って確実な締結状態を維持することが可能となる。 By providing the collar 3 as described above, the resin component 1 uses bolts 6 and nuts 7 to form a metal object to be fastened, for example, an automobile body, as illustrated in FIG. On the other hand, when the resin component 1 is fastened, the resin molded body 2 and the bolt 6 do not come into direct contact with each other, so that it is possible to suppress the creep phenomenon from occurring in the molded body 2. As a result, even when a lapse of time has passed from the fastening, it is possible to suppress the bolt 6 from loosening and maintain a reliable fastening state for a long period of time.

カラー3の材料としては、特に限定されないが、本発明に係る製造方法においては、樹脂部品1を被締結物5に締結した後のクリープの発生を防止する観点から、成形体2(成形品前駆体20)に用いられる材料よりもクリープによる変位量が小さな材料であることが好ましい。このような材料としては、例えば、一般的な金属材料等が挙げられる。 The material of the collar 3 is not particularly limited, but in the manufacturing method according to the present invention, from the viewpoint of preventing the occurrence of creep after the resin component 1 is fastened to the object to be fastened 5, the molded body 2 (precursor of the molded product). It is preferable that the material has a smaller amount of displacement due to creep than the material used for the body 20). Examples of such a material include general metal materials and the like.

カラー3を金属材料から構成する場合、その金属の種類は特に限定されないが、コストや強度を両立させること等を考慮した場合、例えば、鉄、アルミニウム又は真鍮の何れかを用いることが好ましい。 When the color 3 is made of a metal material, the type of the metal is not particularly limited, but when considering both cost and strength, for example, iron, aluminum or brass is preferably used.

さらに、カラー3の材料としては、金属以外の材料であっても、上記のような、成形体2の材料よりもクリープによる変位量が小さな材料であれば、適宜採用することができる。このような材料としては、例えば、カラー3の肉厚方向で配向した炭素繊維を含む繊維強化樹脂やセラミック材料等が挙げられる。 Further, as the material of the collar 3, even if it is a material other than metal, it can be appropriately adopted as long as it is a material having a smaller amount of displacement due to creep than the material of the molded body 2 as described above. Examples of such a material include a fiber reinforced resin containing carbon fibers oriented in the thickness direction of the color 3 and a ceramic material.

上述したように、樹脂部品1は、図3に示すように、樹脂部品1を金属製の被締結物5に締結した際、ボルト6が樹脂製の成形体2には当接せず、ボルト6のヘッド部62がカラー3のハット部32に当接する。これにより、ボルト6の締結に伴う軸方向の力をカラー3で受けることとなり、樹脂製の成形体2にクリープが生じるのを抑制できるので、ボルト6に経時的な緩みが生じるのを防止することが可能になる。 As described above, in the resin component 1, as shown in FIG. 3, when the resin component 1 is fastened to the metal object to be fastened 5, the bolt 6 does not come into contact with the resin molded body 2, and the bolt 6 is bolted. The head portion 62 of 6 comes into contact with the hat portion 32 of the collar 3. As a result, the collar 3 receives the axial force associated with the fastening of the bolt 6, and it is possible to suppress the occurrence of creep in the resin molded body 2, so that the bolt 6 is prevented from loosening over time. Will be possible.

なお、本実施形態においては、カラー3として、図示例のような略ハット型のものを挙げて説明しているが、これには限定されない。例えば、カラーとして単純な筒状のものを採用することができ、このようなカラーを樹脂部品に用いた場合でも、カラーの筒長方向の端部に締結用のボルトを当接させることで、上記同様、成形体にクリープが生じることなく、経時的なボルトの緩みが生じるのを抑制できる。 In the present embodiment, the color 3 is described with a substantially hat type as shown in the illustrated example, but the color 3 is not limited to this. For example, a simple tubular one can be adopted as the collar, and even when such a collar is used for resin parts, by abutting the fastening bolt on the end of the collar in the tubular length direction, the fastening bolt can be brought into contact with the resin part. Similar to the above, it is possible to prevent the bolt from loosening over time without causing creep in the molded body.

また、カラー3のハット部32の形状としても、図示例のような平面視円形状のものには限定されず、平面視矩形状等、他の形状とすることも可能である。また、筒部31の形状としても、図示例のような円筒状のものには限定されず、例えば、角筒状とすることも可能である。このようなカラーを用いた場合には、成形体2に形成される貫通孔21及び凹部22の形状も、カラーの形状に合わせて変更すればよい。 Further, the shape of the hat portion 32 of the collar 3 is not limited to the shape of a circular shape in a plan view as shown in the illustrated example, and may be another shape such as a rectangular shape in a plan view. Further, the shape of the tubular portion 31 is not limited to the cylindrical shape as shown in the illustrated example, and may be, for example, a square tubular shape. When such a collar is used, the shapes of the through holes 21 and the recesses 22 formed in the molded body 2 may also be changed according to the shape of the collar.

また、カラー3は、図1中に示すように、筒部31の先端31aが、成形体2(成形品前駆体20)の他面2b側よりも突出するように、成形体2と一体化されていることが好ましい。これにより、図3に示すように、樹脂部品1を金属製の被締結物5に締結した際に、カラー3の先端31aと被締結物5とが当接する一方、樹脂からなる成形体2と被締結物5との間には隙間が確保される。即ち、樹脂部品1の一面2a側においては成形体2とボルト6とが当接せず、且つ、他面2b側においては成形体2と被締結物5の表面5aとが当接しない構成となる。このような構成とすることで、締結箇所において、ボルト6が配置される樹脂部品1の一面2a側のみならず、ナット7が配置される他面2b側においてもクリープ防止効果が得られるので、締結状態が緩むのをより確実に防止できる。 Further, as shown in FIG. 1, the collar 3 is integrated with the molded body 2 so that the tip 31a of the tubular portion 31 protrudes from the other surface 2b side of the molded body 2 (molded article precursor 20). It is preferable that it is. As a result, as shown in FIG. 3, when the resin component 1 is fastened to the metal object to be fastened 5, the tip 31a of the collar 3 and the object to be fastened 5 come into contact with each other, while the molded body 2 made of resin and the molded body 2 are made of resin. A gap is secured between the object to be fastened and the object to be fastened 5. That is, the molded body 2 and the bolt 6 do not abut on one surface 2a side of the resin component 1, and the molded body 2 and the surface 5a of the object to be fastened 5 do not abut on the other surface 2b side. Become. With such a configuration, the creep prevention effect can be obtained not only on the one side 2a side of the resin component 1 where the bolt 6 is arranged but also on the other surface 2b side where the nut 7 is arranged at the fastening point. It is possible to prevent the tightened state from loosening more reliably.

<繊維強化樹脂部品の製造方法>
以下、上記のような繊維強化樹脂部品1を製造する方法について、図4~図8を参照しながら説明する(樹脂部品1の構成については図1~図3も参照)。
上述したように、本実施形態の樹脂部品1の製造方法は、強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグ(図4中の符号20A,20B,20Cを参照)からなる、貫通孔21が形成された成形品前駆体20を形成する貫通孔形成工程と、カラー3を貫通孔21に挿通させる挿通工程と、成形品前駆体20とカラー3とを一体化させる一体成形工程と、を備える。
以下、本実施形態の製造方法に備えられる各工程について説明する。
<Manufacturing method of fiber reinforced plastic parts>
Hereinafter, a method for manufacturing the fiber-reinforced resin component 1 as described above will be described with reference to FIGS. 4 to 8 (see also FIGS. 1 to 3 for the configuration of the resin component 1).
As described above, the method for producing the resin component 1 of the present embodiment is from a sheet-shaped prepreg (see reference numerals 20A, 20B, 20C in FIG. 4) containing a reinforcing fiber and a thermosetting matrix resin composition. The through-hole forming step of forming the molded product precursor 20 in which the through-hole 21 is formed, the insertion step of inserting the collar 3 into the through-hole 21, and the integration of the molded product precursor 20 and the collar 3 are integrated. It is equipped with a molding process.
Hereinafter, each step provided in the manufacturing method of the present embodiment will be described.

[貫通孔形成工程]
まず、貫通孔形成工程においては、図4に例示するように、成形品前駆体20を構成する複数のプリプレグ20A,20B,20Cに対し、所定の位置、大きさ及び所定の数で貫通孔を形成する。この際、貫通孔を形成する方法としては特に限定されず、従来からプリプレグに加工処理を施す場合に用いられている工具を何ら制限無く採用することができる。また、図示例においては、プリプレグ20B,20Cに貫通孔21を形成し、プリプレグ20Aに、貫通孔21よりも大きな貫通孔(凹部22)を形成している。
[Through hole forming step]
First, in the through-hole forming step, as illustrated in FIG. 4, through-holes are formed at a predetermined position, size, and a predetermined number with respect to a plurality of prepregs 20A, 20B, 20C constituting the molded product precursor 20. Form. At this time, the method for forming the through hole is not particularly limited, and a tool conventionally used for processing a prepreg can be adopted without any limitation. Further, in the illustrated example, the through holes 21 are formed in the prepregs 20B and 20C, and the through holes (recesses 22) larger than the through holes 21 are formed in the prepreg 20A.

そして、貫通孔形成工程においては、シート状のプリプレグ20A,20B,20Cに上記の各貫通孔を形成した後、図5に示すように、シート状のプリプレグ20A,20B,20Cを積層して成形品前駆体20を得る。この際、例えば、図示略の平坦な台座の上で、シート状のプリプレグ20A,20B,20Cを順次積層することで、これらプリプレグを積層する方法を採用できる。また、積層後の成形品前駆体20においては、厚み方向におけるプリプレグ20Aの位置で、平面視で貫通孔21の開口部を取り囲むように、上述した凹部22が設けられる。 Then, in the through hole forming step, after forming each of the above through holes in the sheet-shaped prepregs 20A, 20B, 20C, the sheet-shaped prepregs 20A, 20B, 20C are laminated and formed as shown in FIG. Product precursor 20 is obtained. At this time, for example, a method of laminating these prepregs by sequentially laminating the sheet-shaped prepregs 20A, 20B, 20C on a flat pedestal (not shown) can be adopted. Further, in the molded product precursor 20 after lamination, the above-mentioned recess 22 is provided at the position of the prepreg 20A in the thickness direction so as to surround the opening of the through hole 21 in a plan view.

なお、後述の挿通工程において貫通孔21に挿通するカラーとして、図1及び図2等に示すような概略ハット型のカラー3を用いる場合には、上記のように、貫通孔21とともに、ハット部32が収容される凹部22を成形品前駆体20の一面2a側に形成することが好ましい。 When a substantially hat-shaped collar 3 as shown in FIGS. 1 and 2 is used as the collar to be inserted into the through hole 21 in the insertion step described later, the hat portion is used together with the through hole 21 as described above. It is preferable to form the recess 22 in which the 32 is accommodated on the one side 2a side of the molded product precursor 20.

また、図4,5に示す例においては、シート状のプリプレグ20A,20B,20Cに貫通孔を形成した後、これらを積層して成形品前駆体20を形成する例を説明しているが、これには限定されない。例えば、貫通孔形成工程を、シート状のプリプレグ20A,20B,20Cを積層した後、まとめて貫通孔を形成する工程としてもよい。 Further, in the examples shown in FIGS. Not limited to this. For example, the through hole forming step may be a step of laminating the sheet-shaped prepregs 20A, 20B, 20C and then collectively forming the through hole.

[挿通工程]
次に、挿通工程においては、上記の貫通孔形成工程において成形品前駆体20に形成された貫通孔21に対し、カラー3を挿通する。
より具体的には、図6に示すように、まず、成形型4を構成する下型41の上面41a側に設けられた位置決めピン42にカラー3を挿通する。この際、ハット部32が下型41の上面41a側に配置されるように、位置決めピン42にカラー3を挿通する。
[Insert process]
Next, in the insertion step, the collar 3 is inserted through the through hole 21 formed in the molded product precursor 20 in the above-mentioned through hole forming step.
More specifically, as shown in FIG. 6, first, the collar 3 is inserted through the positioning pin 42 provided on the upper surface 41a side of the lower mold 41 constituting the molding mold 4. At this time, the collar 3 is inserted through the positioning pin 42 so that the hat portion 32 is arranged on the upper surface 41a side of the lower die 41.

次いで、図7に示すように、下型41の上面41aに対して、成形品前駆体20の一面2a側を重ね合わせる。この際、成形品前駆体20に形成された貫通孔21にカラー3の筒部31が挿通され、且つ、凹部22にハット部32が収容されるように、成形品前駆体20の位置を調整しながら、成形品前駆体20を下型41上に重ね合わせる。これにより、成形品前駆体20の貫通孔21(及び凹部22)に、カラー3が挿通された状態となる。 Next, as shown in FIG. 7, the one side 2a side of the molded product precursor 20 is overlapped with the upper surface 41a of the lower mold 41. At this time, the position of the molded product precursor 20 is adjusted so that the tubular portion 31 of the collar 3 is inserted into the through hole 21 formed in the molded product precursor 20 and the hat portion 32 is accommodated in the recess 22. While doing so, the molded product precursor 20 is superposed on the lower mold 41. As a result, the collar 3 is inserted into the through hole 21 (and the recess 22) of the molded product precursor 20.

[一体成形工程]
次に、一体成形工程においては、成形品前駆体20を加熱して硬化させることにより、カラー3を一体化させながら成形品前駆体20を成形することで、成形品前駆体20に所定の形状を付与しながら硬化させて成形体2とし、且つ、この成形体2(成形品前駆体20)とカラー3とを一体化させる。
[Integral molding process]
Next, in the integral molding step, the molded product precursor 20 is heated and cured to form the molded product precursor 20 while integrating the collar 3, so that the molded product precursor 20 has a predetermined shape. Is applied and cured to form a molded product 2, and the molded product 2 (molded product precursor 20) and the collar 3 are integrated.

本発明に係る製造方法においては、一体成形工程において、成形品前駆体20を、減圧雰囲気中において加熱する方法、即ち、真空バッグ成形法や、成形品前駆体20を、減圧雰囲気中において加熱加圧する方法、即ち、オートクレーブ法を採用できる。あるいは、本発明の製造方法においては、一体成形工程において成形品前駆体20を加熱加圧する方法として、例えば、成形品前駆体20を、一対の金型からなる成形型で加熱加圧するプレス成形法(例えば、Pre-preg Compression Molding:PCM成形法)を採用することも可能である。 In the manufacturing method according to the present invention, in the integral molding step, the molded product precursor 20 is heated in a reduced pressure atmosphere, that is, the vacuum bag molding method or the molded product precursor 20 is heated in a reduced pressure atmosphere. A pressing method, that is, an autoclave method can be adopted. Alternatively, in the manufacturing method of the present invention, as a method of heating and pressurizing the molded product precursor 20 in the integral molding step, for example, a press molding method in which the molded product precursor 20 is heated and pressed by a molding die composed of a pair of dies. (For example, Pre-preg Compression Molding: PCM molding method) can also be adopted.

以下、一体成形工程に上記のプレス成形法を適用した場合の手順について説明する。
具体的には、詳細な図示を省略するが、まず、成形品前駆体20に対し、必要に応じて、ヒータで加熱することによって予備賦形を施す。なお、予備賦形を行わなくても圧縮成形が可能なプリプレグを積層して成形品前駆体20を構成した場合には、上記の予備賦形は行わなくてもよい。
Hereinafter, the procedure when the above press molding method is applied to the integral molding step will be described.
Specifically, although detailed illustration is omitted, first, the molded product precursor 20 is preliminarily shaped by heating it with a heater, if necessary. When the molded product precursor 20 is formed by laminating prepregs capable of compression molding without performing preliminary shaping, the above-mentioned preliminary shaping may not be performed.

次いで、図8に示すように、一対の上型43及び下型41からなる成形型4により、成形品前駆体20を加熱加圧してカラー3と一体成形する。即ち、カラー3を成形型4内に配置したインサート成形により、カラー3を貫通孔21及び凹部22に強固に固定させながら成形品前駆体20を加熱加圧することで、成形品前駆体20を、形状を付与した成形体2に成形する。また、この際、上型43及び下型41で挟み込むことで成形品前駆体20を加圧しながら、上型43及び下型41を加熱することで加熱加圧を行い、成形体2とカラー3とが一体化された樹脂部品1(図1参照)を得る。 Next, as shown in FIG. 8, the molded product precursor 20 is heated and pressed by a molding die 4 composed of a pair of upper dies 43 and lower dies 41 to be integrally molded with the collar 3. That is, by insert molding in which the collar 3 is arranged in the molding die 4, the molded product precursor 20 is heated and pressed while the collar 3 is firmly fixed to the through hole 21 and the recess 22 to obtain the molded product precursor 20. It is molded into a molded body 2 having a shape. Further, at this time, while pressing the molded product precursor 20 by sandwiching it between the upper mold 43 and the lower mold 41, heating and pressurizing the upper mold 43 and the lower mold 41 are performed, and the molded product 2 and the collar 3 are pressed. A resin component 1 (see FIG. 1) integrated with and is obtained.

一体成形工程における成形型4の温度、即ち成形温度は、マトリックス樹脂組成物を構成する熱硬化性樹脂の種類(熱硬化温度)等に応じて適宜設定できる。
また、一体成形工程における成形時間は、上記の成形温度に応じて適宜設定することができる。
The temperature of the molding die 4 in the integral molding step, that is, the molding temperature can be appropriately set according to the type of the thermosetting resin (thermosetting temperature) constituting the matrix resin composition and the like.
Further, the molding time in the integral molding step can be appropriately set according to the above-mentioned molding temperature.

その後、一体成形工程においては、成形品前駆体20(プリプレグ)が十分に硬化した後に成形型4を開いて上型43と下型41を離型させ、樹脂部品1を脱型して取り出す。 After that, in the integral molding step, after the molded product precursor 20 (prepreg) is sufficiently cured, the molding die 4 is opened to release the upper die 43 and the lower die 41, and the resin component 1 is demolded and taken out.

本発明に係る製造方法においては、上記のような方法で成形品前駆体20を成形することで、貫通孔21及び凹部22に挿通・収容されたカラー3を固定する。この際、成形品前駆体20とカラー3とが密着して強固に一体化された状態となるので、樹脂部品1全体の機械的強度特性が高められる。このように、成形体2(成形品前駆体20)とカラー3とが強固に一体化される理由としては、成形品前駆体20(プリプレグ)をなす強化繊維樹脂が硬化するのに伴い、貫通孔21及び凹部22内において、カラー3が強化繊維樹脂によって接着されて、強固に固定されるためと考えられる。
さらに、例えば、カラー32のハット部32表面に凹凸処理等を施しておくことで、カラー3と成形体との間の固定強度がより高められる。
In the manufacturing method according to the present invention, the molded product precursor 20 is molded by the method as described above to fix the collar 3 inserted and accommodated in the through hole 21 and the recess 22. At this time, since the molded product precursor 20 and the collar 3 are in close contact with each other and firmly integrated, the mechanical strength characteristics of the entire resin component 1 are enhanced. In this way, the reason why the molded product 2 (molded product precursor 20) and the collar 3 are firmly integrated is that the reinforcing fiber resin forming the molded product precursor 20 (prepreg) is cured and penetrates. It is considered that the collar 3 is adhered by the reinforcing fiber resin in the hole 21 and the recess 22 and is firmly fixed.
Further, for example, by applying unevenness treatment or the like to the surface of the hat portion 32 of the collar 32, the fixing strength between the collar 3 and the molded body can be further enhanced.

なお、本発明に係る製造方法においては、上述したように、一体成形工程において、減圧雰囲気中において加熱する真空バッグ成形法や、減圧雰囲気中で加熱加圧するオートクレーブ法を採用することが可能である。このように、真空バッグ成形法やオートクレーブ法を採用した場合においても、一般的な条件で一体成形を行うことが可能である。 In the manufacturing method according to the present invention, as described above, in the integral molding step, it is possible to adopt a vacuum bag molding method that heats in a reduced pressure atmosphere and an autoclave method that heats and pressurizes in a reduced pressure atmosphere. .. As described above, even when the vacuum bag molding method or the autoclave method is adopted, it is possible to perform integral molding under general conditions.

また、一体成形工程においては、図1に示すように、カラー3の筒部31の先端31aが、成形体2(成形品前駆体20)の他面2b側よりも突出するように、成形品前駆体20とカラー3とを一体成形できるように、成形型4を適宜調整することがより好ましい。これにより、図3に示すように、樹脂部品1を金属製の被締結物5に締結した際、樹脂からなる成形体2と被締結物5とが当接しないので、ボルト6が配置される樹脂部品1の一面2a側に加え、ナット7が配置される他面2b側においてもクリープ防止効果が得られ、締結状態が緩むのをより確実に防止できる。 Further, in the integral molding step, as shown in FIG. 1, the molded product is such that the tip 31a of the tubular portion 31 of the collar 3 protrudes from the other surface 2b side of the molded body 2 (molded product precursor 20). It is more preferable to appropriately adjust the molding die 4 so that the precursor 20 and the collar 3 can be integrally molded. As a result, as shown in FIG. 3, when the resin component 1 is fastened to the metal object to be fastened 5, the molded body 2 made of resin and the object to be fastened 5 do not come into contact with each other, so that the bolt 6 is arranged. In addition to the one side 2a side of the resin component 1, the creep prevention effect can be obtained on the other side 2b side where the nut 7 is arranged, and the tightened state can be more reliably prevented from loosening.

本発明に係る製造方法では、上記のような、貫通孔21が形成された成形品前駆体20(プリプレグ)を形成する貫通孔形成工程と、その後、成形品前駆体20を硬化することで、カラーを一体化させながら成形品前駆体20を成形する一体成形工程とを備え、硬化する前の比較的軟らかなプリプレグに貫通孔を形成する方法を採用している。これにより、従来のような、成形品前駆体を成形して硬化させた後に、非常に硬い状態となった成形品前駆体に貫通孔を形成する場合に比べ、加工性が向上する。 In the manufacturing method according to the present invention, the through-hole forming step of forming the molded product precursor 20 (prepreg) on which the through-hole 21 is formed is performed, and then the molded product precursor 20 is cured. It is provided with an integral molding step of molding the molded product precursor 20 while integrating the collars, and adopts a method of forming through holes in a relatively soft prepreg before curing. As a result, the workability is improved as compared with the conventional case where a through hole is formed in the molded product precursor which has become very hard after being molded and cured.

また、通常、プリプレグを加熱硬化した硬化物は、成形型から離形された後に変形する場合が多い。また、この際の変形量や硬化収縮量は、各硬化物について個体差がある。従来、上記のような個体差がある硬化物を加工受け治具に固定する際には、硬化物を固定する位置が個体毎に変わりやすいため、貫通孔の位置精度が低いという問題があった。これに対し、本発明に係る製造方法においては、プリプレグを硬化する前に貫通孔を形成するため、位置精度(加工精度)が格段に向上する。 Further, usually, a cured product obtained by heat-curing a prepreg is often deformed after being released from a molding die. Further, the amount of deformation and the amount of curing shrinkage at this time vary from individual to individual for each cured product. Conventionally, when fixing a cured product having individual differences as described above to a processing receiving jig, there is a problem that the position accuracy of the through hole is low because the position where the cured product is fixed easily changes for each individual. .. On the other hand, in the manufacturing method according to the present invention, since the through hole is formed before the prepreg is cured, the position accuracy (machining accuracy) is remarkably improved.

また、上記の一体成形工程において、成形品前駆体20に形状を付与する成形、及び、成形品前駆体20(成形体2)へのカラー3の固定の両方を同時に行うことにより、従来は成形工程後に行っていた、接着等によるカラーの取り付け工程を省略できる。従って、これにより、樹脂部品1の生産性が高められるとともに、カラー3が強固に固定され、機械的強度特性等にも優れた樹脂部品1を製造することが可能になる。 Further, in the above-mentioned integral molding step, conventionally, molding is performed by simultaneously performing both molding to give a shape to the molded product precursor 20 and fixing of the collar 3 to the molded product precursor 20 (molded body 2). It is possible to omit the process of attaching the collar by bonding, etc., which was performed after the process. Therefore, as a result, the productivity of the resin component 1 is enhanced, the collar 3 is firmly fixed, and the resin component 1 having excellent mechanical strength characteristics and the like can be manufactured.

[繊維強化樹脂部品の被締結物への締結構造]
図3に示すように、本発明に係る製造方法によって得られる樹脂部品1を、例えば、金属製で板状とされた被締結物5に締結する場合には、例えば、締結具としてボルト6及びナット7を用いる。この際、樹脂部品1に備えられるカラー3の空洞部33、及び、被締結物5に形成された貫通孔51内にボルト6のねじ部61を挿通し、ボルト6のヘッド部62をカラー3のハット部32に当接させる。そして、被締結物5の裏側、即ち樹脂部品1とは反対側の裏面5b側にナット7を配置し、ボルト6のねじ部61をナット7に螺入してゆくことで、樹脂部品1を被締結物5に締結(ねじ留め)する。
[Fixing structure of fiber reinforced resin parts to objects to be fastened]
As shown in FIG. 3, when the resin component 1 obtained by the manufacturing method according to the present invention is fastened to, for example, a metal plate-shaped object to be fastened, for example, a bolt 6 as a fastener and a fastener are used. A nut 7 is used. At this time, the screw portion 61 of the bolt 6 is inserted into the hollow portion 33 of the collar 3 provided in the resin component 1 and the through hole 51 formed in the object to be fastened 5, and the head portion 62 of the bolt 6 is inserted into the collar 3. It is brought into contact with the hat portion 32 of. Then, the nut 7 is arranged on the back side of the object to be fastened 5, that is, on the back surface 5b side opposite to the resin part 1, and the screw portion 61 of the bolt 6 is screwed into the nut 7 to form the resin part 1. Fasten (screw) to the object to be fastened 5.

本発明に係る製造方法によって得られる樹脂部品1の締結対象である金属製の被締結物5としては、特に限定されないが、例えば、自動車の車体や航空機の機体等が挙げられる。被締結物5が自動車の車体である場合には、フェンダー、スイッチパネル、センターコンソール等の内装、ルームミラーカバー、バックミラーカバー、ホイールカバー、エンジンカバー等のカバー類、ステアリングホイル、又はヘッドランプリフレクタ等の各種部材において、樹脂部品1の構成を適用することが可能である。 The metal object to be fastened 5 to be fastened to the resin component 1 obtained by the manufacturing method according to the present invention is not particularly limited, and examples thereof include an automobile body and an aircraft body. When the object to be fastened 5 is the vehicle body of an automobile, the interior of the fender, switch panel, center console, etc., covers such as the rearview mirror cover, rearview mirror cover, wheel cover, engine cover, steering wheel, or headlamp reflector. It is possible to apply the configuration of the resin component 1 to various members such as the above.

上記の締結構造によれば、ボルト6が樹脂製の成形体2には当接せず、ボルト6のヘッド部62がカラー3のハット部32に当接することで、ボルト6の締結に伴う軸方向の力をカラー3で受ける構造となる。これにより、樹脂製の成形体2にクリープが生じるのを抑制できるので、ボルト6に経時的な緩みが生じるのを防止することが可能になる。 According to the above fastening structure, the bolt 6 does not abut on the resin molded body 2, but the head portion 62 of the bolt 6 abuts on the hat portion 32 of the collar 3, whereby the shaft associated with the fastening of the bolt 6 is engaged. The structure is such that the directional force is received by the collar 3. As a result, it is possible to prevent creep from occurring in the resin molded body 2, and it is possible to prevent the bolt 6 from loosening over time.

なお、本実施形態においては、樹脂部品1を被締結物5に締結するための締結具としてボルト6及びナット7を用いる方法を例示して説明しているが、締結具はこれらのものには限定されない。例えば、金属製のリベットやピン等を締結具に用いた場合においても、本発明による効果は十分に発揮される。 In this embodiment, a method of using bolts 6 and nuts 7 as fasteners for fastening the resin component 1 to the object to be fastened 5 is illustrated and described, but the fasteners are not included in these fasteners. Not limited. For example, even when a metal rivet, a pin, or the like is used as a fastener, the effect of the present invention is fully exhibited.

<その他>
以上、本発明の実施の形態について図面を参照しながら詳述したが、本実施形態における各構成及びそれらの組み合わせ等は一例であり、本発明の趣旨から逸脱しない範囲内で、構成の付加、省略、置換、及びその他の変更が可能である。また、本発明は本実施形態によって限定されるものではなく、特許請求の範囲によってのみ限定される。
<Others>
Although the embodiments of the present invention have been described in detail with reference to the drawings, the configurations and combinations thereof in the present embodiment are examples, and the addition of the configurations can be made without departing from the spirit of the present invention. It can be omitted, replaced, and other changes. Further, the present invention is not limited to the present embodiment, but is limited only by the scope of claims.

本発明の繊維強化樹脂部品の製造方法は、樹脂のクリープ現象の影響を受けることがなく、経時的に締結力の緩みが生じるのを抑制できる繊維強化樹脂部品を、優れた加工精度で、生産性よく低コストで製造できる方法なので、例えば、航空機や車両等の様々な用途において非常に好適である。 The method for manufacturing a fiber-reinforced resin component of the present invention produces a fiber-reinforced resin component that is not affected by the creep phenomenon of the resin and can suppress the loosening of the fastening force over time with excellent processing accuracy. Since it is a method that can be manufactured easily and at low cost, it is very suitable for various applications such as aircraft and vehicles.

1…繊維強化樹脂部品(樹脂部品)
2…成形体
2a…一面
2b…他面
20…成形品前駆体
20A,20B,20C…プリプレグ(複数のプリプレグ)
21…貫通孔
22…凹部
3…カラー
31…筒部
31a…先端
32…ハット部
33…空洞部
4…成形型
41…下型
41a…上面
42…位置決めピン
43…上型
5…被締結物
5a…表面
5b…裏面
51…貫通孔
6…ボルト
61…ねじ部
62…ヘッド部
7…ナット
1 ... Fiber reinforced resin parts (resin parts)
2 ... Molded body 2a ... One side 2b ... Other side 20 ... Molded product precursor 20A, 20B, 20C ... Prepreg (plural prepregs)
21 ... Through hole 22 ... Recessed portion 3 ... Collar 31 ... Cylinder part 31a ... Tip 32 ... Hat part 33 ... Cavity part 4 ... Molding mold 41 ... Lower mold 41a ... Top surface 42 ... Positioning pin 43 ... Upper mold 5 ... ... Front surface 5b ... Back surface 51 ... Through hole 6 ... Bolt 61 ... Threaded part 62 ... Head part 7 ... Nut

Claims (9)

強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、
内部に空洞部が設けられた円筒状の筒部を有するカラーを前記貫通孔に挿通させる挿通工程と、
前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、
を備える、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing reinforcing fibers and a thermosetting matrix resin composition are sequentially laminated.
An insertion step of inserting a collar having a cylindrical tubular portion provided with a hollow portion into the through hole, and an insertion step of inserting the collar into the through hole.
An integral molding step of molding while integrating the molded product precursor and the collar,
A method for manufacturing a fiber reinforced resin component for an automobile body or an aircraft body.
強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、
位置決めピンに、内部に空洞部が設けられた円筒状の筒部を有するカラー、及び、前記成形品前駆体に形成された前記貫通孔を挿通させ、前記カラーと前記成形品前駆体との位置を調整しながら前記カラーを前記貫通孔に挿通させる挿通工程と、
前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、
を備える、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing reinforcing fibers and a thermosetting matrix resin composition are sequentially laminated.
A collar having a cylindrical tubular portion having a hollow portion inside and the through hole formed in the molded product precursor are inserted into the positioning pin, and the positions of the collar and the molded product precursor are inserted. The insertion step of inserting the collar into the through hole while adjusting the
An integral molding step of molding while integrating the molded product precursor and the collar,
A method for manufacturing a fiber reinforced resin component for an automobile body or an aircraft body.
強化繊維及び熱硬化性のマトリックス樹脂組成物を含有するシート状のプリプレグが複数枚で順次積層されてなる、貫通孔が形成された成形品前駆体を形成する貫通孔形成工程と、
内部に空洞部が設けられた円筒状の筒部を有するカラーを前記貫通孔に挿通させる挿通工程と、
前記成形品前駆体と前記カラーとを一体化させながら成形する一体成形工程と、
を備え、
前記カラーは、前記筒部及びハット部を有するハット型に形成されており、
前記貫通孔形成工程は、前記貫通孔とともに、前記成形品前駆体の一面に、前記カラーの前記ハット部が収容される凹部を形成し、
前記挿通工程は、前記ハット部を前記凹部に収容しながら、前記筒部を前記貫通孔に挿通させる、自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
A through-hole forming step of forming a molded product precursor having through-holes, in which a plurality of sheet-shaped prepregs containing reinforcing fibers and a thermosetting matrix resin composition are sequentially laminated.
An insertion step of inserting a collar having a cylindrical tubular portion provided with a hollow portion into the through hole, and an insertion step of inserting the collar into the through hole.
An integral molding step of molding while integrating the molded product precursor and the collar,
Equipped with
The collar is formed in a hat shape having the cylinder portion and the hat portion.
In the through-hole forming step, a recess in which the hat portion of the collar is housed is formed on one surface of the molded article precursor together with the through-hole.
The insertion step is a method for manufacturing a fiber-reinforced resin component for an automobile body or an aircraft body, in which the tube portion is inserted into the through hole while the hat portion is housed in the recess.
前記複数枚のプリプレグのうち、前記一体成形工程において成形型と接する側に配置された前記プリプレグの前記貫通孔が、他の前記貫通孔よりも大きく、
前記挿通工程は、前記カラーの前記ハット部を、前記複数枚のプリプレグのうち、前記成形型と接する側の前記プリプレグの前記貫通孔と接する状態とする工程を含む、請求項3に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。
Among the plurality of prepregs, the through hole of the prepreg arranged on the side in contact with the molding die in the integral molding step is larger than the other through holes.
The automobile according to claim 3, wherein the insertion step includes a step of bringing the hat portion of the collar into contact with the through hole of the prepreg on the side in contact with the molding mold among the plurality of prepregs. A method for manufacturing fiber reinforced resin parts for the body of a car body or an aircraft.
前記一体成形工程は、前記成形品前駆体を、一対の金型からなる成形型で加熱加圧して硬化する、請求項1~請求項4の何れか一項に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。 The vehicle body or an aircraft according to any one of claims 1 to 4, wherein in the integral molding step, the molded article precursor is heated and pressed by a molding die composed of a pair of dies to be cured. Manufacturing method of fiber reinforced resin parts for aircraft. 前記一体成形工程は、前記成形品前駆体を、減圧雰囲気中において加熱して硬化する、請求項1~請求項4の何れか一項に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。 The fiber-reinforced resin component for an automobile body or an aircraft body according to any one of claims 1 to 4, wherein in the integral molding step, the molded product precursor is heated and cured in a reduced pressure atmosphere. Manufacturing method. 前記一体成形工程は、前記成形品前駆体を、減圧雰囲気中において加熱加圧して硬化する、請求項1~請求項4の何れか一項に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。 The fiber-reinforced resin for an automobile body or an aircraft body according to any one of claims 1 to 4, wherein in the integral molding step, the molded article precursor is heated and pressurized in a reduced pressure atmosphere to be cured. How to manufacture parts. 前記一体成形工程は、前記カラーの筒部の先端が前記成形品前駆体の他面側よりも突出するように、前記成形品前駆体と前記カラーとを一体成形する、請求項1~請求項7の何れか一項に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。 Claims 1 to claim 1 to the integrally molding step, wherein the molded product precursor and the collar are integrally molded so that the tip of the tubular portion of the collar protrudes from the other surface side of the molded product precursor. 7. The method for manufacturing a fiber reinforced resin part for an automobile body or an aircraft body according to any one of 7. 前記プリプレグに含有される熱硬化性のマトリックス樹脂組成物が、エポキシ系樹脂又はウレタン系樹脂である、請求項1~請求項8の何れか一項に記載の自動車の車体又は航空機の機体用繊維強化樹脂部品の製造方法。 The fiber for an automobile body or an aircraft body according to any one of claims 1 to 8, wherein the thermosetting matrix resin composition contained in the prepreg is an epoxy resin or a urethane resin. Manufacturing method of reinforced resin parts.
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